Public Member Functions | |
~StandardCapabilities () override=default | |
bool | SupportsOffscreenMSAA () const override |
Whether the context backend supports attaching offscreen MSAA color/stencil textures. More... | |
bool | SupportsImplicitResolvingMSAA () const override |
Whether the context backend supports multisampled rendering to the on-screen surface without requiring an explicit resolve of the MSAA color attachment. More... | |
bool | SupportsSSBO () const override |
Whether the context backend supports binding Shader Storage Buffer Objects (SSBOs) to pipelines. More... | |
bool | SupportsTextureToTextureBlits () const override |
Whether the context backend supports blitting from one texture region to another texture region (via the relevant BlitPass::AddCopy overloads). More... | |
bool | SupportsFramebufferFetch () const override |
Whether the context backend is able to support pipelines with shaders that read from the framebuffer (i.e. pixels that have been written by previous draw calls in the current render pass). More... | |
bool | SupportsCompute () const override |
Whether the context backend supports ComputePass . More... | |
bool | SupportsComputeSubgroups () const override |
Whether the context backend supports configuring ComputePass command subgroups. More... | |
bool | SupportsReadFromResolve () const override |
Whether the context backend supports binding the current RenderPass attachments. This is supported if the backend can guarantee that attachment textures will not be mutated until the render pass has fully completed. More... | |
bool | SupportsDecalSamplerAddressMode () const override |
Whether the context backend supports SamplerAddressMode::Decal . More... | |
bool | SupportsTriangleFan () const override |
Whether the primitive type TriangleFan is supported by the backend. More... | |
PixelFormat | GetDefaultColorFormat () const override |
Returns a supported PixelFormat for textures that store 4-channel colors (red/green/blue/alpha). More... | |
PixelFormat | GetDefaultStencilFormat () const override |
Returns a supported PixelFormat for textures that store stencil information. May include a depth channel if a stencil-only format is not available. More... | |
PixelFormat | GetDefaultDepthStencilFormat () const override |
Returns a supported PixelFormat for textures that store both a stencil and depth component. This will never return a depth-only or stencil-only texture. Returns PixelFormat::kUnknown if no suitable depth+stencil format was found. More... | |
bool | SupportsDeviceTransientTextures () const override |
Whether the context backend supports allocating StorageMode::kDeviceTransient (aka "memoryless") textures, which are temporary textures kept in tile memory for the duration of the RenderPass it's attached to. More... | |
PixelFormat | GetDefaultGlyphAtlasFormat () const override |
Returns the default pixel format for the alpha bitmap glyph atlas. More... | |
ISize | GetMaximumRenderPassAttachmentSize () const override |
Return the maximum size of a render pass attachment. More... | |
bool | SupportsPrimitiveRestart () const override |
Whether primitive restart is supported. More... | |
bool | SupportsExtendedRangeFormats () const override |
Whether the XR formats are supported on this device. More... | |
size_t | GetMinimumUniformAlignment () const override |
The minimum alignment of uniform value offsets in bytes. More... | |
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virtual | ~Capabilities () |
Friends | |
class | CapabilitiesBuilder |
Additional Inherited Members | |
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Capabilities () | |
Capabilities (const Capabilities &)=delete | |
Capabilities & | operator= (const Capabilities &)=delete |
Definition at line 14 of file capabilities.cc.
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overridedefault |
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inlineoverridevirtual |
Returns a supported PixelFormat
for textures that store 4-channel colors (red/green/blue/alpha).
Implements impeller::Capabilities.
Definition at line 62 of file capabilities.cc.
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inlineoverridevirtual |
Returns a supported PixelFormat
for textures that store both a stencil and depth component. This will never return a depth-only or stencil-only texture. Returns PixelFormat::kUnknown
if no suitable depth+stencil format was found.
Implements impeller::Capabilities.
Definition at line 72 of file capabilities.cc.
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inlineoverridevirtual |
Returns the default pixel format for the alpha bitmap glyph atlas.
Some backends may use Red channel while others use grey. This should not have any impact
Implements impeller::Capabilities.
Definition at line 82 of file capabilities.cc.
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inlineoverridevirtual |
Returns a supported PixelFormat
for textures that store stencil information. May include a depth channel if a stencil-only format is not available.
Implements impeller::Capabilities.
Definition at line 67 of file capabilities.cc.
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inlineoverridevirtual |
Return the maximum size of a render pass attachment.
Note that this may be smaller than the maximum allocatable texture size.
Implements impeller::Capabilities.
Definition at line 87 of file capabilities.cc.
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inlineoverridevirtual |
The minimum alignment of uniform value offsets in bytes.
Implements impeller::Capabilities.
Definition at line 100 of file capabilities.cc.
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inlineoverridevirtual |
Whether the context backend supports ComputePass
.
Implements impeller::Capabilities.
Definition at line 41 of file capabilities.cc.
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inlineoverridevirtual |
Whether the context backend supports configuring ComputePass
command subgroups.
Implements impeller::Capabilities.
Definition at line 44 of file capabilities.cc.
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inlineoverridevirtual |
Whether the context backend supports SamplerAddressMode::Decal
.
Implements impeller::Capabilities.
Definition at line 54 of file capabilities.cc.
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inlineoverridevirtual |
Whether the context backend supports allocating StorageMode::kDeviceTransient
(aka "memoryless") textures, which are temporary textures kept in tile memory for the duration of the RenderPass
it's attached to.
This feature is especially useful for MSAA and stencils.
Implements impeller::Capabilities.
Definition at line 77 of file capabilities.cc.
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inlineoverridevirtual |
Whether the XR formats are supported on this device.
This is only ever true for iOS and macOS devices. We may need to revisit this API when approaching wide gamut rendering for Vulkan and GLES.
Implements impeller::Capabilities.
Definition at line 95 of file capabilities.cc.
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inlineoverridevirtual |
Whether the context backend is able to support pipelines with shaders that read from the framebuffer (i.e. pixels that have been written by previous draw calls in the current render pass).
Example of reading from the first color attachment in a GLSL shader: ``` uniform subpassInput subpass_input;
out vec4 frag_color;
void main() { vec4 color = subpassLoad(subpass_input); // Invert the colors drawn to the framebuffer. frag_color = vec4(vec3(1) - color.rgb, color.a); } ```
Implements impeller::Capabilities.
Definition at line 36 of file capabilities.cc.
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inlineoverridevirtual |
Whether the context backend supports multisampled rendering to the on-screen surface without requiring an explicit resolve of the MSAA color attachment.
Implements impeller::Capabilities.
Definition at line 25 of file capabilities.cc.
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inlineoverridevirtual |
Whether the context backend supports attaching offscreen MSAA color/stencil textures.
Implements impeller::Capabilities.
Definition at line 20 of file capabilities.cc.
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inlineoverridevirtual |
Whether primitive restart is supported.
Implements impeller::Capabilities.
Definition at line 92 of file capabilities.cc.
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inlineoverridevirtual |
Whether the context backend supports binding the current RenderPass
attachments. This is supported if the backend can guarantee that attachment textures will not be mutated until the render pass has fully completed.
This is possible because many mobile graphics cards track RenderPass
attachment state in intermediary tile memory prior to Storing the pass in the heap allocated attachments on DRAM. Metal's hazard tracking and Vulkan's barriers are granular enough to allow for safely accessing attachment textures prior to storage in the same RenderPass
.
Implements impeller::Capabilities.
Definition at line 49 of file capabilities.cc.
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inlineoverridevirtual |
Whether the context backend supports binding Shader Storage Buffer Objects (SSBOs) to pipelines.
Implements impeller::Capabilities.
Definition at line 28 of file capabilities.cc.
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inlineoverridevirtual |
Whether the context backend supports blitting from one texture region to another texture region (via the relevant BlitPass::AddCopy
overloads).
Implements impeller::Capabilities.
Definition at line 31 of file capabilities.cc.
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inlineoverridevirtual |
Whether the primitive type TriangleFan is supported by the backend.
Implements impeller::Capabilities.
Definition at line 59 of file capabilities.cc.
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friend |
Definition at line 142 of file capabilities.cc.